Microsoft pushed a focused Release Preview package on December 1, 2025 — KB5070311 — that updates Windows 11 on both the 24H2 and 25H2 servicing tracks (OS Builds 26100.7309 and 26200.7309) and pairs modest but widely useful UI polish with device‑gated Copilot+ improvements and an important...
accessibility
aggiornamenti preview
copilot
dark mode
dark mode polish
dark mode regression
driver issues
explorer
file explorer
file explorer fixes
interface regression
kb5070311
known issues
lsass
on-device ai
preview
release preview
software update
stabilità lsass
ui regression
virtual workspaces
whiteflash
windows
windows 11
windows 11 dark mode
windows 11 preview
windows studio effects
Windows 11’s dark mode is supposed to be easy on the eyes — yet for years many users have been greeted with a jarring white flash every time File Explorer opens a new window or tab, turning a momentary UX glitch into a recurring irritation and, for a minority, a genuine health hazard. That flash...
Imagine this: you're surfing the web late at night, all cozy in your self-imposed bat cave, your PC's theme is perfectly set to dark mode for that immersive feel. Then, BOOM — you open a new tab in Microsoft Edge or Google Chrome, and there it is. That retina-burning white flash. For a moment...